Sucrose is considered a disaccharide because:
a. It has three or more simple sugar subunits.
b. It has two simple sugar subunits.
c. It has ten simple sugar subunits.
b
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Which of the following events occurs initially when Escherichia coli cells are in a gradient of a chemorepellent?
A. Flagella rotate clockwise B. CheY is phorphorylated C. CheA autophosphorylates D. Cells tumble
Which of the following terms is used to describe a synthetic DNA fragment?
A) DNA cassette B) DNA hybrid C) recombinant DNA D) artificial chromosome
Reverse transcriptase copies
A. DNA to DNA. B. DNA to RNA. C. RNA to DNA D. RNA to RNA.
Although the function of the flexible outer sheath in which the axial filaments of spirochetes lay is unknown, it is essential (i.e., the bacteria will not survive if it is removed).
Answer the following statement true (T) or false (F)